Quantitative Analysis Flashcards
What is the concentration formula triangle used for?
It helps solve problems related to concentration and moles.
How do you calculate the amount of solute in moles in a solution?
Use the formula: Moles = Concentration x Volume.
What should you do before starting a concentration problem in an exam?
Write down the concentration-moles formula triangle to ensure all parts are correct.
What is a titration?
A method of analyzing the concentration of solutions, particularly acid-base reactions.
What is the purpose of acid-base titrations?
To determine how much alkali is needed to neutralize a quantity of acid, and vice versa.
What is the significance of concordant results in titrations?
They are results that are within 0.1 cm³ of each other, increasing accuracy.
What hazards are associated with sodium hydroxide and hydrochloric acid?
Both can cause harm to skin and eyes; safety goggles should be used.
What is the formula to calculate the concentration of an acid after a titration?
Concentration = Moles ÷ Volume.
What is the actual yield in a chemical reaction?
The recorded amount of product obtained from the reaction.
What is the theoretical yield?
The amount of product that would be obtained under perfect conditions.
How is percentage yield calculated?
Percentage yield = (Actual yield ÷ Theoretical yield) x 100.
What is atom economy?
It measures the efficiency of a reaction by comparing the mass of useful products to the total mass of reactants.
What is the molar volume of a gas at room temperature and pressure (RTP)?
24 dm³ or 24,000 cm³.
How do you convert volume of gas to moles at RTP?
Use the formula: Moles = Volume ÷ Molar Volume.
What is the first step in calculating the volume of a gas from its mass?
Convert the mass into moles.
What should you ensure when solving gas volume problems?
Use the correct units as specified in the question.
